Mercurial > sdl-ios-xcode
annotate src/video/SDL_blit.h @ 2860:6ce28e5287e9
Date: Sun, 07 Dec 2008 13:35:23 +0100
From: Couriersud
Subject: SDL: Mouse last_x, last_y into SDL_Mouse
the attached diff moves the static vars last_x and last_y into
SDL_Mouse. These, as far as I understand it, should be tied to the
individual mouse.
The patch also makes the code check for out of window conditions of
mouse->x,y when relative movements are passed to MouseSendMotion.
Also attached is the latest DirectFB code (dfb20081208) supporting
multiple mice and keyboards. This works quite well with sdlmame now. It
however needs more testing with different directfb configurations.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 08 Dec 2008 00:52:12 +0000 |
| parents | 99210400e8b9 |
| children | e40448bc7727 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 2859 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 14 |
|
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 #ifndef _SDL_blit_h | |
| 25 #define _SDL_blit_h | |
| 26 | |
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27 #ifdef __MMX__ |
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28 #include <mmintrin.h> |
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29 #endif |
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30 #ifdef __3dNOW__ |
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31 #include <mm3dnow.h> |
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32 #endif |
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33 #ifdef __SSE__ |
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34 #include <xmmintrin.h> |
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35 #endif |
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36 #ifdef __SSE2__ |
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37 #include <emmintrin.h> |
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38 #endif |
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39 |
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40 #include "SDL_cpuinfo.h" |
| 0 | 41 #include "SDL_endian.h" |
| 42 | |
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43 /* SDL blit copy flags */ |
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44 #define SDL_COPY_MODULATE_COLOR 0x00000001 |
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45 #define SDL_COPY_MODULATE_ALPHA 0x00000002 |
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46 #define SDL_COPY_MASK 0x00000010 |
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47 #define SDL_COPY_BLEND 0x00000020 |
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48 #define SDL_COPY_ADD 0x00000040 |
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49 #define SDL_COPY_MOD 0x00000080 |
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50 #define SDL_COPY_COLORKEY 0x00000100 |
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51 #define SDL_COPY_NEAREST 0x00000200 |
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52 #define SDL_COPY_RLE_DESIRED 0x00001000 |
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53 #define SDL_COPY_RLE_COLORKEY 0x00002000 |
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54 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 |
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55 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) |
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56 |
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57 /* SDL blit CPU flags */ |
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58 #define SDL_CPU_ANY 0x00000000 |
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59 #define SDL_CPU_MMX 0x00000001 |
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60 #define SDL_CPU_3DNOW 0x00000002 |
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61 #define SDL_CPU_SSE 0x00000004 |
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62 #define SDL_CPU_SSE2 0x00000008 |
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63 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 |
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64 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 |
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65 |
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66 typedef struct |
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67 { |
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68 Uint8 *src; |
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69 int src_w, src_h; |
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70 int src_pitch; |
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71 int src_skip; |
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72 Uint8 *dst; |
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73 int dst_w, dst_h; |
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74 int dst_pitch; |
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75 int dst_skip; |
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76 SDL_PixelFormat *src_fmt; |
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77 SDL_PixelFormat *dst_fmt; |
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78 Uint8 *table; |
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79 int flags; |
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80 Uint32 colorkey; |
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81 Uint8 r, g, b, a; |
| 0 | 82 } SDL_BlitInfo; |
| 83 | |
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84 typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); |
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85 |
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86 typedef struct |
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87 { |
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88 Uint32 src_format; |
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89 Uint32 dst_format; |
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90 int flags; |
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91 int cpu; |
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92 SDL_BlitFunc func; |
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93 } SDL_BlitFuncEntry; |
| 0 | 94 |
| 95 /* Blit mapping definition */ | |
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96 typedef struct SDL_BlitMap |
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97 { |
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98 SDL_Surface *dst; |
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99 int identity; |
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100 SDL_blit blit; |
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101 void *data; |
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102 SDL_BlitInfo info; |
| 0 | 103 |
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104 /* the version count matches the destination; mismatch indicates |
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105 an invalid mapping */ |
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106 unsigned int format_version; |
| 0 | 107 } SDL_BlitMap; |
| 108 | |
| 109 /* Functions found in SDL_blit.c */ | |
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110 extern int SDL_CalculateBlit(SDL_Surface * surface); |
| 0 | 111 |
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112 /* Functions found in SDL_blit_*.c */ |
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113 extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); |
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114 extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); |
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115 extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); |
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116 extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); |
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117 |
| 0 | 118 /* |
| 119 * Useful macros for blitting routines | |
| 120 */ | |
| 121 | |
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122 #if defined(__GNUC__) |
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123 #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v |
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124 #elif defined(_MSC_VER) |
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125 #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v |
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126 #else |
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127 #define DECLARE_ALIGNED(t,v,a) t v |
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128 #endif |
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129 |
| 0 | 130 #define FORMAT_EQUAL(A, B) \ |
| 131 ((A)->BitsPerPixel == (B)->BitsPerPixel \ | |
| 132 && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) | |
| 133 | |
| 134 /* Load pixel of the specified format from a buffer and get its R-G-B values */ | |
| 135 /* FIXME: rescale values to 0..255 here? */ | |
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136 #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| 0 | 137 { \ |
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138 r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ |
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139 g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ |
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140 b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ |
| 0 | 141 } |
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142 #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| 0 | 143 { \ |
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144 r = (((Pixel&0xF800)>>11)<<3); \ |
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145 g = (((Pixel&0x07E0)>>5)<<2); \ |
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146 b = ((Pixel&0x001F)<<3); \ |
| 0 | 147 } |
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148 #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| 0 | 149 { \ |
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150 r = (((Pixel&0x7C00)>>10)<<3); \ |
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151 g = (((Pixel&0x03E0)>>5)<<3); \ |
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152 b = ((Pixel&0x001F)<<3); \ |
| 0 | 153 } |
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154 #define RGB_FROM_RGB888(Pixel, r, g, b) \ |
| 0 | 155 { \ |
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156 r = ((Pixel&0xFF0000)>>16); \ |
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157 g = ((Pixel&0xFF00)>>8); \ |
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158 b = (Pixel&0xFF); \ |
| 0 | 159 } |
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160 #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ |
| 0 | 161 do { \ |
| 162 switch (bpp) { \ | |
| 163 case 2: \ | |
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164 Pixel = *((Uint16 *)(buf)); \ |
| 0 | 165 break; \ |
| 166 \ | |
| 167 case 3: { \ | |
| 168 Uint8 *B = (Uint8 *)(buf); \ | |
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169 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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170 Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ |
| 0 | 171 } else { \ |
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172 Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ |
| 0 | 173 } \ |
| 174 } \ | |
| 175 break; \ | |
| 176 \ | |
| 177 case 4: \ | |
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178 Pixel = *((Uint32 *)(buf)); \ |
| 0 | 179 break; \ |
| 180 \ | |
| 181 default: \ | |
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182 Pixel; /* stop gcc complaints */ \ |
| 0 | 183 break; \ |
| 184 } \ | |
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185 } while (0) |
| 0 | 186 |
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187 #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| 0 | 188 do { \ |
| 189 switch (bpp) { \ | |
| 190 case 2: \ | |
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191 Pixel = *((Uint16 *)(buf)); \ |
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192 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 193 break; \ |
| 194 \ | |
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195 case 3: { \ |
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196 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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197 r = *((buf)+fmt->Rshift/8); \ |
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198 g = *((buf)+fmt->Gshift/8); \ |
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199 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 200 } else { \ |
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201 r = *((buf)+2-fmt->Rshift/8); \ |
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202 g = *((buf)+2-fmt->Gshift/8); \ |
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203 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 204 } \ |
| 205 } \ | |
| 206 break; \ | |
| 207 \ | |
| 208 case 4: \ | |
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209 Pixel = *((Uint32 *)(buf)); \ |
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210 RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| 0 | 211 break; \ |
| 212 \ | |
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213 default: \ |
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214 Pixel; /* stop gcc complaints */ \ |
| 0 | 215 break; \ |
| 216 } \ | |
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217 } while (0) |
| 0 | 218 |
| 219 /* Assemble R-G-B values into a specified pixel format and store them */ | |
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220 #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ |
| 0 | 221 { \ |
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222 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 223 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 224 ((b>>fmt->Bloss)<<fmt->Bshift); \ | |
| 225 } | |
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226 #define RGB565_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 227 { \ |
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228 Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ |
| 0 | 229 } |
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230 #define RGB555_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 231 { \ |
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232 Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ |
| 0 | 233 } |
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234 #define RGB888_FROM_RGB(Pixel, r, g, b) \ |
| 0 | 235 { \ |
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236 Pixel = (r<<16)|(g<<8)|b; \ |
| 0 | 237 } |
| 238 #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ | |
| 239 { \ | |
| 240 switch (bpp) { \ | |
| 241 case 2: { \ | |
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242 Uint16 Pixel; \ |
| 0 | 243 \ |
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244 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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245 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 246 } \ |
| 247 break; \ | |
| 248 \ | |
| 249 case 3: { \ | |
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250 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 251 *((buf)+fmt->Rshift/8) = r; \ |
| 252 *((buf)+fmt->Gshift/8) = g; \ | |
| 253 *((buf)+fmt->Bshift/8) = b; \ | |
| 254 } else { \ | |
| 255 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 256 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 257 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 258 } \ | |
| 259 } \ | |
| 260 break; \ | |
| 261 \ | |
| 262 case 4: { \ | |
|
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263 Uint32 Pixel; \ |
| 0 | 264 \ |
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265 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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266 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 267 } \ |
| 268 break; \ | |
| 269 } \ | |
| 270 } | |
| 271 #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ | |
| 272 { \ | |
| 273 switch (bpp) { \ | |
| 274 case 2: { \ | |
| 275 Uint16 *bufp; \ | |
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276 Uint16 Pixel; \ |
| 0 | 277 \ |
| 278 bufp = (Uint16 *)buf; \ | |
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279 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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280 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 281 } \ |
| 282 break; \ | |
| 283 \ | |
| 284 case 3: { \ | |
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285 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 286 *((buf)+fmt->Rshift/8) = r; \ |
| 287 *((buf)+fmt->Gshift/8) = g; \ | |
| 288 *((buf)+fmt->Bshift/8) = b; \ | |
| 289 } else { \ | |
| 290 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 291 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 292 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 293 } \ | |
| 294 } \ | |
| 295 break; \ | |
| 296 \ | |
| 297 case 4: { \ | |
| 298 Uint32 *bufp; \ | |
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299 Uint32 Pixel; \ |
| 0 | 300 \ |
| 301 bufp = (Uint32 *)buf; \ | |
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302 PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ |
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303 *bufp = Pixel | (*bufp & Amask); \ |
| 0 | 304 } \ |
| 305 break; \ | |
| 306 } \ | |
| 307 } | |
| 308 | |
| 309 /* FIXME: Should we rescale alpha into 0..255 here? */ | |
|
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310 #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| 0 | 311 { \ |
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312 r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ |
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313 g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ |
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314 b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ |
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315 a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ |
| 0 | 316 } |
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317 #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ |
| 0 | 318 { \ |
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319 r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ |
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320 g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ |
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321 b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ |
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322 a = (Pixel&fmt->Amask)>>fmt->Ashift; \ |
| 0 | 323 } |
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324 #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ |
| 0 | 325 { \ |
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326 r = (Pixel>>24); \ |
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327 g = ((Pixel>>16)&0xFF); \ |
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328 b = ((Pixel>>8)&0xFF); \ |
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329 a = (Pixel&0xFF); \ |
| 0 | 330 } |
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331 #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ |
| 0 | 332 { \ |
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333 r = ((Pixel>>16)&0xFF); \ |
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334 g = ((Pixel>>8)&0xFF); \ |
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335 b = (Pixel&0xFF); \ |
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336 a = (Pixel>>24); \ |
| 0 | 337 } |
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338 #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ |
| 0 | 339 { \ |
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340 r = (Pixel&0xFF); \ |
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341 g = ((Pixel>>8)&0xFF); \ |
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342 b = ((Pixel>>16)&0xFF); \ |
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343 a = (Pixel>>24); \ |
| 0 | 344 } |
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345 #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| 0 | 346 do { \ |
| 347 switch (bpp) { \ | |
| 348 case 2: \ | |
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349 Pixel = *((Uint16 *)(buf)); \ |
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350 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 351 break; \ |
| 352 \ | |
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353 case 3: { \ |
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354 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
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355 r = *((buf)+fmt->Rshift/8); \ |
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356 g = *((buf)+fmt->Gshift/8); \ |
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357 b = *((buf)+fmt->Bshift/8); \ |
| 0 | 358 } else { \ |
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359 r = *((buf)+2-fmt->Rshift/8); \ |
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360 g = *((buf)+2-fmt->Gshift/8); \ |
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361 b = *((buf)+2-fmt->Bshift/8); \ |
| 0 | 362 } \ |
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363 a = 0xFF; \ |
| 0 | 364 } \ |
| 365 break; \ | |
| 366 \ | |
| 367 case 4: \ | |
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368 Pixel = *((Uint32 *)(buf)); \ |
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369 RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| 0 | 370 break; \ |
| 371 \ | |
| 372 default: \ | |
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373 Pixel; /* stop gcc complaints */ \ |
| 0 | 374 break; \ |
| 375 } \ | |
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376 } while (0) |
| 0 | 377 |
| 378 /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ | |
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379 #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ |
| 0 | 380 { \ |
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381 Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ |
| 0 | 382 ((g>>fmt->Gloss)<<fmt->Gshift)| \ |
| 383 ((b>>fmt->Bloss)<<fmt->Bshift)| \ | |
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384 ((a>>fmt->Aloss)<<fmt->Ashift); \ |
| 0 | 385 } |
| 386 #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ | |
| 387 { \ | |
| 388 switch (bpp) { \ | |
| 389 case 2: { \ | |
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390 Uint16 Pixel; \ |
| 0 | 391 \ |
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392 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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393 *((Uint16 *)(buf)) = Pixel; \ |
| 0 | 394 } \ |
| 395 break; \ | |
| 396 \ | |
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397 case 3: { \ |
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398 if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ |
| 0 | 399 *((buf)+fmt->Rshift/8) = r; \ |
| 400 *((buf)+fmt->Gshift/8) = g; \ | |
| 401 *((buf)+fmt->Bshift/8) = b; \ | |
| 402 } else { \ | |
| 403 *((buf)+2-fmt->Rshift/8) = r; \ | |
| 404 *((buf)+2-fmt->Gshift/8) = g; \ | |
| 405 *((buf)+2-fmt->Bshift/8) = b; \ | |
| 406 } \ | |
| 407 } \ | |
| 408 break; \ | |
| 409 \ | |
| 410 case 4: { \ | |
|
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411 Uint32 Pixel; \ |
| 0 | 412 \ |
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413 PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ |
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414 *((Uint32 *)(buf)) = Pixel; \ |
| 0 | 415 } \ |
| 416 break; \ | |
| 417 } \ | |
| 418 } | |
| 419 | |
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420 /* Blend the RGB values of two Pixels based on a source alpha value */ |
| 0 | 421 #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ |
| 422 do { \ | |
| 423 dR = (((sR-dR)*(A))>>8)+dR; \ | |
| 424 dG = (((sG-dG)*(A))>>8)+dG; \ | |
| 425 dB = (((sB-dB)*(A))>>8)+dB; \ | |
| 426 } while(0) | |
| 427 | |
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428 /* Blend the RGB values of two Pixels based on a source alpha value */ |
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429 #define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB) \ |
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430 do { \ |
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431 unsigned tR, tG, tB, tA; \ |
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432 tA = 255 - sA; \ |
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433 tR = 1 + (sR * sA) + (dR * tA); \ |
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434 dR = (tR + (tR >> 8)) >> 8; \ |
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435 tG = 1 + (sG * sA) + (dG * tA); \ |
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436 dG = (tG + (tG >> 8)) >> 8; \ |
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437 tB = 1 + (sB * sA) + (dB * tA); \ |
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438 dB = (tB + (tB >> 8)) >> 8; \ |
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439 } while(0) |
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440 |
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441 |
| 0 | 442 /* This is a very useful loop for optimizing blitters */ |
|
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443 #if defined(_MSC_VER) && (_MSC_VER == 1300) |
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444 /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ |
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445 #else |
| 0 | 446 #define USE_DUFFS_LOOP |
|
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447 #endif |
| 0 | 448 #ifdef USE_DUFFS_LOOP |
| 449 | |
| 450 /* 8-times unrolled loop */ | |
| 451 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 452 { int n = (width+7)/8; \ | |
|
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453 switch (width & 7) { \ |
| 0 | 454 case 0: do { pixel_copy_increment; \ |
| 455 case 7: pixel_copy_increment; \ | |
| 456 case 6: pixel_copy_increment; \ | |
| 457 case 5: pixel_copy_increment; \ | |
| 458 case 4: pixel_copy_increment; \ | |
| 459 case 3: pixel_copy_increment; \ | |
| 460 case 2: pixel_copy_increment; \ | |
| 461 case 1: pixel_copy_increment; \ | |
| 462 } while ( --n > 0 ); \ | |
| 463 } \ | |
| 464 } | |
| 465 | |
| 466 /* 4-times unrolled loop */ | |
| 467 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 468 { int n = (width+3)/4; \ | |
|
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469 switch (width & 3) { \ |
| 0 | 470 case 0: do { pixel_copy_increment; \ |
| 471 case 3: pixel_copy_increment; \ | |
| 472 case 2: pixel_copy_increment; \ | |
| 473 case 1: pixel_copy_increment; \ | |
| 474 } while ( --n > 0 ); \ | |
| 475 } \ | |
| 476 } | |
| 477 | |
|
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478 /* 2 - times unrolled loop */ |
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479 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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480 double_pixel_copy_increment, width) \ |
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481 { int n, w = width; \ |
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482 if( w & 1 ) { \ |
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483 pixel_copy_increment; \ |
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484 w--; \ |
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485 } \ |
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486 if ( w > 0 ) { \ |
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487 n = ( w + 2) / 4; \ |
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488 switch( w & 2 ) { \ |
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489 case 0: do { double_pixel_copy_increment; \ |
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490 case 2: double_pixel_copy_increment; \ |
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491 } while ( --n > 0 ); \ |
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492 } \ |
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493 } \ |
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494 } |
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495 |
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496 /* 2 - times unrolled loop 4 pixels */ |
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497 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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498 double_pixel_copy_increment, \ |
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499 quatro_pixel_copy_increment, width) \ |
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500 { int n, w = width; \ |
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501 if(w & 1) { \ |
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502 pixel_copy_increment; \ |
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503 w--; \ |
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504 } \ |
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505 if(w & 2) { \ |
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506 double_pixel_copy_increment; \ |
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507 w -= 2; \ |
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508 } \ |
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509 if ( w > 0 ) { \ |
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510 n = ( w + 7 ) / 8; \ |
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511 switch( w & 4 ) { \ |
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512 case 0: do { quatro_pixel_copy_increment; \ |
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513 case 4: quatro_pixel_copy_increment; \ |
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514 } while ( --n > 0 ); \ |
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515 } \ |
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516 } \ |
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517 } |
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518 |
| 0 | 519 /* Use the 8-times version of the loop by default */ |
| 520 #define DUFFS_LOOP(pixel_copy_increment, width) \ | |
| 521 DUFFS_LOOP8(pixel_copy_increment, width) | |
| 522 | |
| 523 #else | |
| 524 | |
| 525 /* Don't use Duff's device to unroll loops */ | |
|
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526 #define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \ |
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527 double_pixel_copy_increment, width) \ |
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528 { int n = width; \ |
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529 if( n & 1 ) { \ |
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530 pixel_copy_increment; \ |
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531 n--; \ |
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532 } \ |
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533 n=n>>1; \ |
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534 for(; n > 0; --n) { \ |
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535 double_pixel_copy_increment; \ |
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536 } \ |
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537 } |
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538 |
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539 /* Don't use Duff's device to unroll loops */ |
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540 #define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \ |
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541 double_pixel_copy_increment, \ |
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542 quatro_pixel_copy_increment, width) \ |
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543 { int n = width; \ |
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544 if(n & 1) { \ |
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545 pixel_copy_increment; \ |
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546 n--; \ |
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547 } \ |
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548 if(n & 2) { \ |
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549 double_pixel_copy_increment; \ |
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550 n -= 2; \ |
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551 } \ |
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552 n=n>>2; \ |
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553 for(; n > 0; --n) { \ |
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554 quatro_pixel_copy_increment; \ |
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555 } \ |
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556 } |
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557 |
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558 /* Don't use Duff's device to unroll loops */ |
| 0 | 559 #define DUFFS_LOOP(pixel_copy_increment, width) \ |
| 560 { int n; \ | |
| 561 for ( n=width; n > 0; --n ) { \ | |
| 562 pixel_copy_increment; \ | |
| 563 } \ | |
| 564 } | |
| 565 #define DUFFS_LOOP8(pixel_copy_increment, width) \ | |
| 566 DUFFS_LOOP(pixel_copy_increment, width) | |
| 567 #define DUFFS_LOOP4(pixel_copy_increment, width) \ | |
| 568 DUFFS_LOOP(pixel_copy_increment, width) | |
| 569 | |
| 570 #endif /* USE_DUFFS_LOOP */ | |
| 571 | |
| 572 /* Prevent Visual C++ 6.0 from printing out stupid warnings */ | |
| 573 #if defined(_MSC_VER) && (_MSC_VER >= 600) | |
| 574 #pragma warning(disable: 4550) | |
| 575 #endif | |
| 576 | |
| 577 #endif /* _SDL_blit_h */ | |
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1895
c121d94672cb
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578 /* vi: set ts=4 sw=4 expandtab: */ |